ASME B30.29:2018 pdf free download – Self-Erecting Tower Cranes
Volume B30.29 includes provisions that apply to the construction, operation, inspection, testing, and mainte- nance of powered se If-erecting tower cranes that adjust operating radius by means of a trolley traversing a jib. These may be horizontal, elevated, articulating, or telescoping, and used for vertical lifting and lowering of freely suspended, unguided loads that consist of equip- ment and materials. Self-erecting tower cranes have vertical or nearly vertical masts that are bottom slewing and mounted on fixed, traveling, or mobile bases. The cranes are capable of moving or being moved from job site to job site fully assembled or nearly fully assembled. This Volume does not apply to cranes used for nonver- tical lifting service or lifting a guided load, or to truck- mounted material delivery cranes with a tubular boom and trolley traversing the boom. Tower cranes (refer to ASME B30.3) and mobile crane tower attac hments (refer to ASME B30.5) are not within the scope of this Volume.
ballast: weig hts added to the fixed frame to create addi- tional stability or to counter the effects of the lifted load. bogie: the assembly that includes a pivot, frame, axle(s), and wheel(s) on which a crane rides on rails, and includes an assembly oftwo or more axles arranged to permit both vertical wheel displacement and an equalization of loading on the wheels. brake: a device other than a motor used for retarding or stopping motion by friction or power means. braking means: a method or device for retarding or stop- ping motion. buffer: an energy-absorbing device for reducing impact when a moving crane or trolley reaches the end of its permitted travel. cab: a housing provided for the operator and containing the crane controls. control station: the location of the crane function controls, either cab- mounted or by remote control. counterweight: weights added to the rotating frame to create aditional stability or to counter the effects of the lifted load. crane: in this Volume, the use ofthe word“crane” refersto self-erecting cranes, which are lfting machines, mounted on a base, with a superstructure consisting of a mast, rotating frame, and a jib. . crossover points: points of rope contact where one layer of rope on a rope drum crosses over the previous layer. direct supervision: adesignated operator in the immediate area of the trainee, within visual sighting distance, and able to effectively communicate with the trainee. The designatedoperator shall have no duties other than obser- ving the oneration of the crane by the trainee.
The equipment covered by the B30 Standard is subject to hazards that cannot be abated by mechanical means, but only by the exercise of intelligence, care, and common sense. It is therefore essential to have personnel involved in the use and operation ofequipment who are competent, careful, physically and mentally qualified, and trained in the proper operation ofthe equipment and the handling of loads. Serious hazards include, but are not limited to, im proper or inadequate maintenance, overloading, drop- ping or slipping ofthe load, obstructing the free passage of the load, and using equipment for a purpose for which it was not intended or designed.